/Engine/Source/Runtime/ApplicationCore/Public/GenericPlatform/Accessibility/GenericAccessibleInterfaces.h
How much the value should increase/decrease when the user attempts to modify the value using UI controls. Note: This should always return a positive value. The caller is responsible for negating it when attempting to decrease.
A number suggesting how much to modifyGetValue()by when the user wants to increase/decrease the value.
virtual float GetStepSize() const